Metal-working machine



B. WERNER METAL wonxxue MACHINE vF'iled June 30, 1922 H N 4 AM June 10192;

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S, mf lw v AN \AN Patented June 10, 1924.

BERNARD WERNER, OF BROOKLYN, NEW YORK, ASSIGNOR TO EVA WERNER, OF NEWYORK, N. Y.

METAL-WORKING MACHINE.

Application filed. June 30, 1922.

To all whom it may (3077.06771.

Be it known that I, BERNARD \VERNER, a citizen of the United States, andresident of Brooklyn, in the county of Kings and State of New York haveinvented certain new and useful Improvements in Metal- VVorkingMachines, of which thefollowing is a specification.

My present invention relates primarily to metal twisting machinery andmore particularly to machines for twisting a definite portion of thelength of a metal bar out of the general plane thereof. The inventionhas one of many possible applications in the manufacture of the bridleirons or stirrups commonly used as beam supports in the buildingindustry.

It is an object of the invention to provide a reliable machine of theabove type which can be readily set or adjusted without sacrifice ofrigidity for operating upon a bar to form therein a twisted segment ofany selected length.

Another object is to provide a machine of the above type to which thebar to he twisted can be readily, and accurately applied andexpeditiously removed after completion of the twisting operation.

Other objects will be in part obvious and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations of elements and arrangement of parts which will beexemplified in the construction hereinafter set forth, and the scope ofthe appli cation of which will be indicated in the following claims.

In the accompanying drawings in which is shown one or more of variouspossible embodiments of the several features of this invention,

Fig. 1 is a plan view of a preferred form of machine.

Fig. 2 is a side elevation thereof,

Fig. 3 is an end elevation thereof,

Fig. 4 is a fragmentary side view showing the commencement of thetwisting operation.

Fig. 5 is a view generally similar to Fig. 4 showing the completion ofthe twisting operation,

Fig. 6 is a sectional view on an enlarged scale showing the holding andstripping plungers, and;

Serial No. 571,896.

Fig. 7 is a perspective view of the product of the machine. 1 v

Referrmg to the drawings, I have shown a metal twisting machineincluding standards 1 carrying a bed 2 upon which is journaled a driveshaft 3 1nounted in bearings 4 and having flywheels 6 at the oppositeends. Shaft- 3 is driven from a tight pulley 7 thereon, the usual loosepulley being shown at 8. The drive shaft 3 has a gear 5 at one sidemeshing with gear9 upon countershaft 10 which has at its opposite end apinion 1 1 meshing with a gear 12 mounted on'a'fstud shaft 13 in bearing14. The shaftlacarries a crank arm 15 to which is pivoted the pitman 16,the opposite end of which is pivoted to the oscillatory operating leveror yoke 17 which, in turn, is pivoted about a fixed pivot rod 18 carriedin standards 30 upon the bed 2 of the machine, the yoke being retainedby the ears of said standards against shifting laterally along the pivotrod. The pitman 16 includes a turn-buckle 19 ofusua'l construction bywhich its length canbe adjusted. v

Upon thebed 2 is mounted a backing plate 20 having a short upstandingflange 21 and in front of said'backing plate, and nearfopposite endsthereof are, mountedblocks 22 clamped to the bed by bolts 23 extendingthrough elongated slots 24 in theedges of the blocks for permittingadjustment thereof. The bar 25 to be'twisted is retained with its facevertical between the blocks-and the backing plate with aportion 26 ofthe length thereof exposed between the blocks.

The upper end or stem of the yoke is clamped by bolts and nuts 31against opposite sides of the pitman 16, a reinforce bar 32 extendingaxially of the yoke and being secured between the arms thereof by boltsand nuts 38. The reinforce bar preferably is pivoted at its lower endabout pivot-rod 18 and is retained by ears 34 upon a stand ard on thebed against lateral displacement, the rod 18 extending through saidears. Parallel to the pivot rod 18 the cross rod 35 which carries thetwisting tools 36 and 37 is mounted upon the yoke, the reinforce bar 32providing an additional support for the center of said rod. Eachtwisting lug comprises an' eye 38 rotatably fitted. over the cross rod35 and a projecting radial arm,

lengthwise of the cross rod by collars 40 and 4:1 clamped to the crossrod by set screws 12. Separate coil springs L3 and 44 are secured to thetwisting lugs 36 and 37, the upper ends of said springs being preferablyheld by hooks 45 retained by bolts 46 in any one of a series ofapertures 47 in spring anchor bar &8 secured as at 49 near the stem orupper end of the yoke. A fixed stop bar 50 extends transversely acrossthe yoke to determine the limiting position of the twisting lugs towhich they are normally urged by the springs 43 and 4: as best shown in2.

For maintaining a straight bar against bowing when originally placedinto the machine and for serving as a stripper to facilitate removal ofthe twisted bar from the machine, I provide the arrangement best shownin Fig. 6. This construction comprises a pair of parallel plates 51 and52 spaced by sleeves 53, a series of bolts 54-. extending through saidplates and sleeves to secure th same asat 55 to the lower surface of thebed 2, collars 56 encircling said bolts to spare the upper of the plates51 from the bed. A series of spring-pressed fingers or plungers 57extend vertically upwardly through the bed plate and through alignedopenings 53 and 59 in the lates 51 and 52, coil springs 60 between saidplates encircling said fingers and pressing an integral collar 61 oneach plunger against upper plate 51 to maintain the plungers in elevatedposition. The uper ends of the plungers, as best shown in Fig. 1, arealigned with the edge of the blocks 22 to contact the face of the bar 25to be twisted, when the same is inserted into the machine.

For setting the machine for operation, the twisting lugs 36 and 37 arefirst placed at the distance corresponding to the length of twistedportion desired. For this purpose, it, is merely necessary to loosen theset screws 42 by which the collars 40 and 4-1 are maintained in positionand the lugs are shifted along the length of the cross rod 35 preferablyto points equidistant from the reinforce bar 32 and secured in positionby again tightening the set screws with collars 40 and 41' close againstthe lugs in the position of adjustment. It is preferred to maintain the.retracting springs 43 and 44 with their lengths substantially at rightangles to the length of the cross rod 35 and it will, of course, beapparent that the anchoring ends ofsaid springs may readily be adjustedto substantially such position for any adjustment in the position of thetwisting 11 's. In every position of adjustment the spri q s 4:3 and 44:will, therefore. retract the lugs: without substantial binding oramniing tendency.

In operation, the machine being driven continuously from any suitablesource of power, the bar 25 to be twisted is inserted between the blocks22 and the backing plate 21 by hand, the plungers 57 projecting from themachine serving as stops to prevent bowing of the plate in the originalapplication thereof or to compel straightening of said plate, ifslightly bowed, prior to application, so as to assure accuracy ofapplication for corresponding accuracy of twisting. Before the operatingyoke 17 in the operation of the machine reaches the position shown inFig. the operator presses manually upon the forward surfaces of the lugs36 and 37 against the resistance of springs 43 and L4. Stop nuts 63 onthe twisting lugs determine the operative setting thereof by contactingthe limiting pivot rod 18 as best shown in Fig. 4 for accuratelyaligning the operating ends of the twisting lugs to perform the twistingoperation. As the operation of the machine proceeds, the yoke 17 movestoward and past vertical position and during the operation (see Figs. 4and 5) the ends 39 of the lugs engage the upper edge of the bar and inthe continued rotation thereof exert compression lengthwise of the lugsto force the adjacent and consequently the intermediate part of the edgeof the bar 25 in an are about the lower edge thereof as a center as bestseen in Fig. 5. Since the ends of the bar are firmly maintained againstdistortion by the blocks 22, it will be seen that only the portion ofthe length of the bar exposed between the blocks: is displaced by thetwisting lugs, the short lengths between the blocks and the points ofergagement of the twisting lugs being distorted into short, generallyhelical twists 64 to provide (see Fig. 7) the continuous connectionbetween the ends of the bar and the intermediate section 26 thereof atright angles thereto.

The twisting operation set forth takes place against the springresistance of the projecting plungers 57 which are depressed as the barsection is twisted, as best seen in Fig. 5. When the twisting operationis completed, the operator lets go of the twisting lugs 36 and 37 whichare snapped back by springs 43 and 44- to the position shown in Fig. 2and, as the operating yoke 17 oscillates back toward the right orinactive position, shown in Fig. 2, the expansion of springs 60 causesplungers 57 to elevate the twisted bar from the bed to facilitate manual removal thereof from the machine, and insertion in the mannerheretofore described of the next bar to be twisted, before the operatingyoke has again returned to the operative position shown in Fig. 4.

The reinforce bar 32 on the yoke renders the construction particularlysecure in that it prevents distortion of the yoke 17 and maintains thepivot rod 18 and the cross rod 35 against bowing at the center, wherethe maximum bending moment occurs, which is quite substantial when thetwo twisting lugs are placed close together near the axes of the yokefor providing a short twisted section of bar.

It will thus be seen that there is herein I described apparatus in whichthe several features of this invention are embodied, and which apparatusin its action attains the various objects of the invention and is Wellsuited to meet the requirements of practical use.

As many changes could be made in the above construction, and manyapparently widely different embodiments of this invention could be madewithout departing from the scope thereof, it is intended that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, what I claim as new and desire tosecure by Letters-Patent of the United States is 1. In a metal workingmachine, in combination, a retaining member for the bar to be twisted,exposing a portion of the length of the bar, a mechanically actuatedoperating means including a twisting tool, adjustably secured theretofor effecting the twist at any desired distance from the end of the bar,and spring means for automati cally displacing the twisting tool out ofthe path of the work after completion of the twisting operation andindepr-xndently of the return of the operating means to facilitateaccess to the twisted piece for removal from the machine.

2. In a metal working machine, in combination, a horizontal bed, aretaining member for maintaining a metal bar to be twisted with itswidth extending substantially vertical, a continually reciprocatingoperating member, a twisting tool carried thereby said twisting toolbeing arranged to move with said operating member in an inclineddirection to contact the edge of the verticah ly extending width of thebar and to twist the same in the continued displacement thereof in anoblique direction and spring means returning said tool to inobtrusiveposition independently of the return oft-he operating member.

3. In a twisting machine of the type including a bed, a pair of blocksfor holding the ends of a bar to be twisted and exposing a portionbetween the ends thereof, a pivoted operating lever upon said bed, and apair of twisting tools upon said lever; the combination in which thetwisting arms are pivoted about a cross rod carried by the operatinglever and in which means is provided for fixing said arms at any portionlengthwise of said cross rod.

4. In a metal twisting machine, in combination, a bed, means on said bedfor supporting a bar to be twisted, an "operating yoke pivoted to saidbed adjacent said bar supporting means, means for reciprocating saidyoke about said pivot, a cross rod carried by said yoke, twisting lugsmounted upon said cross rod to engage the edge of the bar to be twistedand to twist the same as the yoke is moved toward one extremity of itspath about the pivot, and means to-v maintain said twisting lugs againstmovement longitudinally along said rod from any position of adjustmentthereon.

5. In a metal twisting machine, in combination, a bed, a pair of blocksthereon for maintaining a bar to be twisted in fixed position exposing aportion between the ends of said bar, an operating yoke pivoted to saidbed adjacent said blocks, means connected to the upper end of said yokefor reciprocating the same about the pivotthereof, a cross rodstraddling the arms of said yoke, a pair of twisting lugs pivotallymounted upon said cross rod, spring means to maintain said lugs ininoperative position, and holding means on said cross rod formaintaining said twisting rods in any fixed position of adjustmentlengthwise thereof.

6. The combination set forth in claim 5 in which the twisting lugs haveeyes on circling the cross rod and in which stop collars encircle saidcross rod at opposite sides of each twisting rod and are adjustablyclamped in position upon said rod to maintain the twisting lugs in anyfixed position of adjustment along the length of the rod to adapt themachine for forming a twisted portion of any desired length.

7. In a metal twisting machine, in combination, an oscillating operatingstructure, a pair of twisting lugs carried thereby to engage and twist abar to be worked, said operating structure including a cross rodparallel to the length of the work, said lugs being adjustablelengthwise of said cross rod. and means for fixing said lugs againstundesired displacement from any position of adjustment, whereby anydesired length of the bar may be twisted.

8. In a metal twisting machine, in combination, an operating memberhaving a pair of spaced arms rigidly connected to each other, means foroscillating said spaced arms, a cross rod connected to said spaced arms,a pair of twisting lugs mounted upon said. cross rod and adjustablelengthwise thereof to increase or decrease the distance therebetween,means to maintain said arms in fixed position lengthwise of said rod,spring means connected to said lugs to maintain the same normally ininoperative position, spring anchoring means carried by said operatingstructure, affording a plurality of alternative positions for the anchoren of said springs for positioning the same substantially at rightangles to said cross rod for any position of adjustment of said twistinglugs.

9. In a metal twisting machine, in combination, a bed, an oscillatoryoperating structure mounted thereon, said operating structure includinga pivot rod adjacent the work to be twisted, a cross rod carried by saidoperating structure, said operating structure including a reinforce barengaging said cross rod at its center for maintaining the same againstdistortion, twisting lugs mounted upon said cross rod at opposite sidesof said reinforce bar, and lock means for fixing said lugs againstdisplacement from any desired position of adjustment along said crossrod.

10. In a metal twisting machine, in combination, a bed, an operatingyoke having a pair of diverging arms, a pivot rod therefor upon said bedand adjacent the work to be twisted, a cross rod carried by said yoke, apair of twisting lugs having eyes encircling said cross rod andadjustable lengthwise thereof, and clamping collars for fixing said lugsin any position of adjustment lengthwise of said cross rod for effectinga twisted section of selected length.

- 11. In a metal twisting machine, in combination, a bed, an operatingyoke thereon having a pair of diverging arms, a pivot rod therefor uponsaid bed and adjacent the work to be twisted, a cross rod carried bysaid yoke, a pair of twisting lugs having eyes encircling said crossrods and adjustable lengthwise thereof, clamping collars for fixing saidlugs in any position of adjustment lengthwise of said cross bar forvarying the length of section to be twisted, springs connected to saidlugs, a spring anchor rod for holding the opposite ends of said springto normally urge said lugs to inoperative position, and stop means forlimiting the retraction of said lugs due to said springs.

12. The combination set forth in claim 11 in which the spring anchor baraffords a plurality of alternative holding positions for the anchoredend if said springs.

13. In a metal working machine, in combination, a support, means forretaining a bar of metal to be worked fixed with respect to said supportwith a portion between the ends thereof exposed, and spring operatedmeans to engage a surface of the exposed portion of said bar to retainit against bowing.

M. In a metal working machine, in combination, a bed, a pair of supportblocks thereon for retaining a metal bar in fixed position and exposinga portion therebetween, a backing plate for the work, and fingersspring-pressed through said bed to engage the exposed portion of the barfor maintaining it in contact with said backing plate.

15. In a metal twisting machine, in combination, a bed, a pair of blocksthereon, means to maintain the bar to be worked with its face in avertical plane against said blocks, exposing a portion thereof betweensaid blocks, and spring-pressed fingers projecting upward from said bedsubstantially into engagen'ient with the lower edge of the bar.

16. In a metal twisting machine, in combination, a backing plate, spacedblocks ad jacent thereto for maintaining a bar to be worked with itsface in a vertical plane against said backing plate and with a portionof the length of said bar exposed between said blocks, andspring-pressed fingers extending upward from said bar between saidblocks to maintain said bar against bowing.

17. In a metal twisting machine, in combination, means for holding a barin position, means for twisting a portion of said bar out of the planethereof, and stripping means in the path of the twisting deflection ofthe bar to facilitate removal of the twisted bar from the machine, saidstripping means engaging a portion of the bar to be twisted to maintainthe bar against bowing during the twisting operation.

Signed at New York, in the county of New York and State of New York,this 29th day of June, 1922.

BERNARD WERNER.

